Improvement in fire-regulators for steam-boilers



MPETERS. PHOTO-LI'HOGRAPHER, WASHINGTON, D Cy Nrrnn .STATES JAMES M.ASTIVEN, OF NEW YORK, N.

PATENT OFFICE.

Y., ASSIGNOR TO HIMSELF, MICHAEL TUOMEY, AND JOHN ELDER, JR., OF SAMEPLACE.

Specification forming part of Letters Patent No. 36,128, dated August 5,1862.

.To @ZZ whom t may concern: v

-Beit known that I, J Mns M. STIVEN, of the city and State of New York,have invented, made, and applied to use a certain new and usefulImprovement in Regulators for Steam` Boilers and Steam-IIeating or otherApparatus; and I do hereby declare that the following is a full, clear,and exact description of the said invention, reference being had to theannexed drawings, making part of this specication, whereinl Figure l isan elevation of my regulator. Fig. 2 is a side view of the same, andFigs. 3 and 4 are vertical sections at right angles to each other of thesaid apparatus.

Similar marks of reference denote the same parts.

Various devices have heretofore been made for -regulating the admissionof air or the escape of the draft from the iire by means of the pressurein the boiler. In these instances the pressure of the steam itself hasbeen employed, and but little motion could be obtained, except by anextent of leverage.

The nature oi' my invention consists in a cyl'- inder and piston actedupon by Water,(that is under pressure transmitted from the boilerthrough a pipe communicating with the lower portion ofthe Waterspace ofthe boiler,) said piston being provided with a rod and adjusting screwto regulate the action of a spring and cause the apparatus to beoperative by means of different degrees of pressure in the boiler, andthe motion thus obtained and regulated is applied through the medium ofa lev`er and suitable connections to open or close the fire-door, theash-door, the fluedamper, or the cold-air damper; or my said apparatusmay be made to act on two or more of these simultaneously, thus causingthe pressure in the boiler to become an automatic regulator of the heatthrough the inlets to or out.- lets from the furnace,or both.

In the drawings, a isa pipe communicating with the water-space of theboiler as low down as convenient, b is a water-chamber communicating bythe pipe c with the cylinder d, that is provided with the cover e, andcontains the piston f, that is fitted With the double-cup leathers l 1,as shown in Figs. 3 and 4. The piston-rod g passes up throughthe head e,and

the upper end is guided in the cylinderpat the upper end ofthe frame 7i.This cylinder p is made with a screw-thread ou the exterior, taking thecap m on the said frame h, and q is a hand-wheel by which thescrew-cylinder p can be turned. Zis a spring around the rod g, restingat the lower end on a shoulder, and o is an index-pointer extending fromthe under side 'of p through a slot in m to the index n.- It will now beevident that the pressure of steam in the boiler, acting through thewater thereof on the water or other fluid in the chamber b and cylinderd, willpress upon and move the piston f and rod g, and according to thepoint at which the spring lis compressed by the action of the screw pand indicated on the dial n by the pointer o, so the piston willcommence to vmove with greater or less pressure. Thus in a boiler or insteamheating apparatus the regulation will be effected after a certainpoint of pressure and consequent temperature are attained.

In order to communicate the motion -i'rom the rod g, I employ the lever`k 0n a fulcrum at 5, and passing through a mortise in g, wherein is alink, i, attached by the pin 2, and united with the lever lc by the pin3, so that the lever is free to move as the pistonrod goes up or down.From the end 0r ends of this lever 7c rods or chains pass to therespective doors or dampers, as at 4 and 5. The.

mode of communicating motion to the doors or dampers through the agencyof rods, bent levers, or similar devices will readily suggest themselvesto the mechanic according to the circumstances and mode of setting ofthe furnace or steam apparatus, the operations being so arranged forthat the re is deadened by the checking of the draft as the pistonfrises, and caused to burn with increased brightness as the pistondescends by said doors or dampers directing more draft through the fire.

By the use of the chamber b the water in the cylinder el is kept cool,and hence not liable to injure the cup-leather packings Il; but a siphon-pipe/may be substituted for this chamber b and effect the same object.

What I claim, and desire to secure by Let? ters Patent, is-

1. The cylinder d, pistonf, and chamber b, or its equivalent, incombination with the 1ever-k and a communication to the dampers or InWitness whereof I have hereunto set my doors employed in steam apparatusfor regusignature this 21st day of June, 1862.

lat-,ing the draft of air according to the press- 1 ure of Water n thecylinder d, as set forthr JAMES STIVIJN' 2. The screw p, spring Z, andindex, in com- Vtnesses:

binaton with `he cylinder d, piston f, rod y, LEMUEL W. SERRELL,

and lever k, for the purposes and as seb forth. TI-Ios. GEO. HAROLD.

